Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -rbacc98327ddf6521ba791de7cc0cf024622d2c7e -r4d19866d355b8e6c46627a3650b80ad9a18c1d07
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision bacc98327ddf6521ba791de7cc0cf024622d2c7e)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 4d19866d355b8e6c46627a3650b80ad9a18c1d07)
@@ -81,6 +81,7 @@
 
 #define PSI_TO_MMHG                         ( 51.7149F )                                    ///< Conversion factor for converting PSI to mmHg.
 
+// The new arterial pressure sensor is the same as the venous pressure sensor
 #define VENOUS_PRESSURE_NORMAL_OP           0                                               ///< Venous pressure status bits indicate normal operation.
 #define VENOUS_PRESSURE_CMD_MODE            1                                               ///< Venous pressure status bits indicate sensor in command mode.
 #define VENOUS_PRESSURE_STALE_DATA          2                                               ///< Venous pressure status bits indicate data is stale (no new data since last fpga read).
@@ -817,7 +818,6 @@
                 }
             }
         }
-
         // Check for occlusion in Treatment modes where pumps are moving
         else if ( MODE_TREA == getCurrentOperationMode() )
         {
Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -rd9827fc0e433f400ddabe8058f5598cbaa59454f -r4d19866d355b8e6c46627a3650b80ad9a18c1d07
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision d9827fc0e433f400ddabe8058f5598cbaa59454f)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision 4d19866d355b8e6c46627a3650b80ad9a18c1d07)
@@ -137,7 +137,7 @@
 static U32 primeDialysateBypassStartTime;                       ///< Starting time of priming dialysate bypass circuit.
 static U32 steadyVolumeSamplingStartTime;                       ///< Load cell steady volume sampling interval starting time.
 static F32 minimumReservoirVolume;                              ///< Minimum reservoir volume in mL.
-static U32 steadyVolumeCount;                                   ///< Use to keep track the number of dVolume/dt < Threshold
+static U32 steadyVolumeCount;                                   ///< Use to keep track the number of dVolume/dt < Threshold.
 static BOOL bubbleClearEnded;                                   ///< Bubble clear ended boolean signal.
 
 // ********** private function prototypes **********
@@ -176,6 +176,7 @@
     primeStartTime                   = 0;
     primePauseStartTime              = 0;
     primeStatusBroadcastTimerCounter = 0;
+    bubbleClearEnded                 = FALSE;
 }
 
 /*********************************************************************//**
@@ -475,6 +476,75 @@
 
 /*********************************************************************//**
  * @brief
+ * The handlePrimeBubbleClear function handles bubble clear pressurizing
+ * of dialyzer.
+ * @details Inputs: air trap levels,  primeDialyzerBubbleClearState,
+ * primeSalineDialyzerBubbleClearStartTime
+ * @details Outputs: control valves to pressurize, primeDialyzerBubbleClearState,
+ * primeSalineDialyzerBubbleClearStartTime
+ * @return none
+ *************************************************************************/
+static void handlePrimeBubbleClear( void )
+{
+    U32 timeout;
+
+    switch ( primeDialyzerBubbleClearState )
+    {
+        case PRIME_BUBBLE_CLEAR_READY_STATE:
+        case PRIME_BUBBLE_CLEAR_FLOW_STATE:
+            if ( PRIME_BUBBLE_CLEAR_READY_STATE == primeDialyzerBubbleClearState )
+            {
+                timeout = BUBBLE_CLEAR_WAIT_TIME_INITIAL_MS;
+            }
+            else
+            {
+                timeout = BUBBLE_CLEAR_WAIT_TIME_MS;
+            }
+
+            if ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, timeout ) )
+            {
+                // Close valve to create pressure to clear Dialyzer bubbles
+                primeSalineDialyzerBubbleClearStartTime = getMSTimerCount();
+                if ( AIR_TRAP_LEVEL_AIR == getAirTrapLevel( AIR_TRAP_LEVEL_SENSOR_LOWER ) )
+                {
+                    setValvePosition( VDI, VALVE_POSITION_C_CLOSE );
+                    setValveAirTrap( STATE_CLOSED );
+                    primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_PRESSURE_STATE;
+                }
+            }
+            break;
+
+        case PRIME_BUBBLE_CLEAR_PRESSURE_STATE:
+        case PRIME_BUBBLE_CLEAR_VENT_STATE:
+            if ( ( getMeasuredVenousPressure() > VENOUS_PRESSURE_BUBBLE_CLEAR_MAX_MMHG ) ||
+                 ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, BUBBLE_CLEAR_MAX_TIME_MS ) ) )
+            {
+                // Pressure max reached. or timeout, release pressure
+                setValvePosition( VDI, VALVE_POSITION_A_INSERT_EJECT );
+                primeSalineDialyzerBubbleClearStartTime = getMSTimerCount();
+                bubbleClearEnded = TRUE;
+                primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_VENT_STATE;
+            }
+            else if ( ( TRUE == bubbleClearEnded ) &&
+                      ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, BUBBLE_CLEAR_VALVE_WAIT_TIME_MS ) ) )
+            {
+                setValvePosition( VDI, VALVE_POSITION_C_CLOSE );
+                setValveAirTrap( STATE_OPEN );
+                bubbleClearEnded = FALSE;
+                primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_FLOW_STATE;
+            }
+            break;
+
+        case PRIME_BUBBLE_CLEAR_COMPLETE_STATE:
+        default:
+            // do nothing
+            break;
+
+    } // end switch
+}
+
+/*********************************************************************//**
+ * @brief
  * The handlePrimeSalineSetupState function checks user's request to start
  * priming.
  * @details Inputs: primeStartReqReceived
@@ -546,75 +616,6 @@
 
 /*********************************************************************//**
  * @brief
- * The handlePrimeBubbleClear function handles bubble clear pressurizing
- * of dialyzer.
- * @details Inputs: air trap levels,  primeDialyzerBubbleClearState,
- * primeSalineDialyzerBubbleClearStartTime
- * @details Outputs: control valves to pressurize, primeDialyzerBubbleClearState,
- * primeSalineDialyzerBubbleClearStartTime
- * @return none
- *************************************************************************/
-static void handlePrimeBubbleClear( void )
-{
-    U32 timeout;
-
-    switch ( primeDialyzerBubbleClearState )
-    {
-        case PRIME_BUBBLE_CLEAR_READY_STATE:
-        case PRIME_BUBBLE_CLEAR_FLOW_STATE:
-            if ( PRIME_BUBBLE_CLEAR_READY_STATE == primeDialyzerBubbleClearState )
-            {
-                timeout = BUBBLE_CLEAR_WAIT_TIME_INITIAL_MS;
-            }
-            else
-            {
-                timeout = BUBBLE_CLEAR_WAIT_TIME_MS;
-            }
-
-            if ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, timeout ) )
-            {
-                // Close valve to create pressure to clear Dialyzer bubbles
-                primeSalineDialyzerBubbleClearStartTime = getMSTimerCount();
-                if ( AIR_TRAP_LEVEL_AIR == getAirTrapLevel( AIR_TRAP_LEVEL_SENSOR_LOWER ) )
-                {
-                    setValvePosition( VDI, VALVE_POSITION_C_CLOSE );
-                    setValveAirTrap( STATE_CLOSED );
-                    primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_PRESSURE_STATE;
-                }
-            }
-            break;
-
-        case PRIME_BUBBLE_CLEAR_PRESSURE_STATE:
-        case PRIME_BUBBLE_CLEAR_VENT_STATE:
-            if ( ( getMeasuredVenousPressure() > VENOUS_PRESSURE_BUBBLE_CLEAR_MAX_MMHG ) ||
-                 ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, BUBBLE_CLEAR_MAX_TIME_MS ) ) )
-            {
-                // Pressure max reached. or timeout, release pressure
-                setValvePosition( VDI, VALVE_POSITION_A_INSERT_EJECT );
-                primeSalineDialyzerBubbleClearStartTime = getMSTimerCount();
-                bubbleClearEnded = TRUE;
-                primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_VENT_STATE;
-            }
-            else if ( ( TRUE == bubbleClearEnded ) &&
-                      ( TRUE == didTimeout( primeSalineDialyzerBubbleClearStartTime, BUBBLE_CLEAR_VALVE_WAIT_TIME_MS ) ) )
-            {
-                setValvePosition( VDI, VALVE_POSITION_C_CLOSE );
-                setValveAirTrap( STATE_OPEN );
-                bubbleClearEnded = FALSE;
-                primeDialyzerBubbleClearState = PRIME_BUBBLE_CLEAR_FLOW_STATE;
-            }
-            break;
-
-        case PRIME_BUBBLE_CLEAR_COMPLETE_STATE:
-        default:
-            // do nothing
-            break;
-
-    } // end switch
-}
-
-/*********************************************************************//**
- * @brief
  * The handlePrimePurgeAirState function checks for air trap level and moves
  * to blood circuit circulation state if fluid is detected at upper sensor.
  * @details Inputs: air trap levels, primeFirstPurgePass, purgeAirTimeOutStartTime
@@ -996,6 +997,7 @@
 
     if ( TRUE == isWetSelfTestsPassed() )
     {
+        setCurrent4thLevelState( NO_SUB_STATE );
         state = HD_PRIME_COMPLETE;
     }
     else if ( TRUE == doesAlarmStatusIndicateStop() )